CN105691377B - The starting control method and device of engine - Google Patents
The starting control method and device of engine Download PDFInfo
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- CN105691377B CN105691377B CN201410709353.9A CN201410709353A CN105691377B CN 105691377 B CN105691377 B CN 105691377B CN 201410709353 A CN201410709353 A CN 201410709353A CN 105691377 B CN105691377 B CN 105691377B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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Abstract
A kind of starting control method and device of engine, which comprises when needing to start engine, initiate engine start instruction；The first clutch between the engine and gearbox is set to enter the sliding wear stage by revolving speed and relative speed variation progress closed-loop control, to control the revolving speed of the engine；When the revolving speed of the engine reaches the rotating speed of target of output shaft conversion, first clutch described in locking, initiate engine oil spout firing command, and stabilization control is carried out to output shaft revolving speed using driving motor, to complete the starting of engine, the rotating speed of target of the engine is associated with the output shaft revolving speed of the gearbox.This method realizes that the starting to engine controls by the sliding wear of the first clutch, and stabilization control is carried out to output shaft revolving speed by driving motor, so that engine speed quick and stable is reached target, the ride comfort of engine start can be promoted with smooth starting engine.
Description
Technical field
The present invention relates to the technical field of hybrid power of automobile more particularly to the starting control methods and dress of a kind of engine
It sets.
Background technique
With Global Auto industrial expansion, yield, sales volume and the ownership of automobile are also increasing year by year, but due to working as
There is various disadvantages such as discharge exhaust gas, pollution environment for the preceding fuel engines automobile generally used, the influence to ecological environment
Also increasing.People have stepped up the awareness of sustainable development, and countries in the world environmental protective measure is gradually stringent,
Scheme instead of fuel engines automobile is also more and more, such as is gradually replaced by electric car, hybrid vehicle original
Fuel engines.Hybrid vehicle has reached the mesh for improving fuel economy and reducing discharge on the basis of existing technology
, thus great development prospect.
During hybrid electric vehicle is sailed, it can use multiple power sources instead of engine power and promote vehicle
, so that vehicle minimizes the dependence of engine power, hybrid vehicle can use electric energy etc. to drive vehicle, example
Such as, vehicle can be driven using one or more motors, by the independent operating of motor or can with cooperating for fuel engines
To realize the driving to vehicle, hybrid vehicle can be driven by a variety of power sources.
According to the demand of power in vehicle travel process, engine may be at the state for starting or stopping, and mix
When the power demand of dynamical system is bigger, the function that power provided by motor is unable to satisfy hybrid power system is relied only on
When rate demand, it can star the engine, engine made to enter operating mode, be jointly vehicle by motor and engine
Power is provided.
It in the prior art, may be due to engine in the larger starting engine of the power demand of hybrid power system
Intervention point revolving speed is higher, leads to engine power-assisted not in time, or even can arrive and cause before engine is successfully intervened, generates vehicle
Biggish shake.
Summary of the invention
The problem of being difficult to quick and smooth starting the invention solves engine in hybrid power system.
To solve the above problems, technical solution of the present invention provides a kind of starting control method of engine, the method packet
It includes:
When needing to start engine, engine start instruction is initiated；
The first clutch between the engine and gearbox is set to enter the sliding wear stage, to control the engine
Revolving speed；
When the revolving speed of the engine reaches the rotating speed of target of engine, first clutch described in locking initiates to start
Machine oil spout firing command, and stabilization control is carried out using driving motor output shaft revolving speed, to complete the starting of the engine,
The rotating speed of target of the engine is associated with the output shaft revolving speed of the gearbox.
Optionally, power demand of the engine start instruction by hybrid power control unit based on hybrid power system
It initiates.
Optionally, the power demand of the hybrid power system is accelerator pedal signal, vehicle based on hybrid power system
What travel speed and drivable position determined.
Optionally, the first clutch made between the engine and gearbox enters the sliding wear stage, with control
The revolving speed for making the engine includes:
The first clutch is driven to carry out sliding wear by power source provided by the driving motor in hybrid power system,
The first clutch is set to enter the sliding wear stage；
Regulate and control the pressure of the first clutch cylinder pressure；
Pressure based on the first clutch cylinder pressure controls the sliding wear revolving speed of the first clutch；
The revolving speed of the engine is controlled based on the sliding wear revolving speed of the first clutch.
Optionally, the pressure of the regulation first clutch cylinder pressure includes:
Regulated and controled based on pressure of the pid algorithm to the first clutch cylinder pressure.
Optionally, the pid algorithm is determined based on the difference between engine speed change rate and target revolution speed variation rate
Input value.
Optionally, further includes: if engine speed change rate is consistent with target revolution speed variation rate, stop regulating and controlling described
The pressure of one clutch cylinder pressure.
Optionally, the first clutch includes single plate clutch or multiplate clutch.
Technical solution of the present invention also provides a kind of starting control device of engine, comprising:
Unit is initiated, suitable for initiating engine start instruction when needing to start engine；
Control unit, suitable for making the first clutch between the engine and gearbox enter the sliding wear stage, with
Control the revolving speed of the engine；
Start unit, when rotating speed of target suitable for reaching engine when the revolving speed of the engine, described in locking first from
Clutch initiates engine oil spout firing command, and carries out stabilization control to output shaft revolving speed using driving motor, to complete
The starting of engine is stated, the rotating speed of target of the engine is associated with the output shaft revolving speed of the gearbox.
Optionally, described control unit includes:
Sliding wear subelement, suitable for driving described first by power source provided by the driving motor in hybrid power system
Clutch carries out sliding wear, and the first clutch is made to enter the sliding wear stage；
Regulate and control subelement, suitable for regulating and controlling the pressure of the first clutch cylinder pressure；
First control subelement, the cunning of the first clutch is controlled suitable for the pressure based on the first clutch cylinder pressure
Grind revolving speed；
Second control subelement, the revolving speed of the engine is controlled suitable for the sliding wear revolving speed based on the first clutch.
Compared with prior art, technical solution of the present invention has the advantage that
When needing to start engine, engine start instruction is initiated, is made between the engine and gearbox
First clutch enters the sliding wear stage, and by the control of the sliding wear to the first clutch, realization turns the engine
The control of speed, when the revolving speed of the engine reaches the rotating speed of target of engine, first clutch described in locking, and utilize drive
Dynamic motor carries out stabilization control to output shaft revolving speed, completes the starting of the engine, this method passes through first clutch
The sliding wear of device realizes that the starting to engine controls, and realizes the quick start of engine, and improve the ride comfort of engine start.
Detailed description of the invention
Fig. 1 is the flow diagram of the starting control method for the engine that technical solution of the present invention provides；
Fig. 2 is the position view for the first clutch that technical solution of the present invention provides；
Fig. 3 is the flow diagram of the starting control method of engine provided in an embodiment of the present invention.
Specific embodiment
During hybrid electric vehicle is sailed, hybrid vehicle can be driven by a variety of power sources, mixing
Hybrid power control unit (HCU, Hybrid Control Unit) in dynamical system can be according in vehicle travel process
The demand of power controls the power source in hybrid power system, for example, when the power demand in vehicle travel process is lesser
It waits, the power of hybrid power system can be met by the provided power of one or more motors in hybrid power system
Demand, engine may be at halted state, that is, rely only on one or more motors in hybrid vehicle to drive vehicle,
When the power demand of hybrid power system is larger, when power provided by motor is unable to satisfy the power demand of system,
Start the engine, engine is made to enter operating mode, hybrid power system provides power by motor and engine jointly, leads to
Cross the cooperate driving completed to vehicle of the motor with engine.
It in the prior art,, may be due to hair when starting engine when the power demand of hybrid power system is larger
Motivation access point revolving speed is higher, causes engine that cannot start in time, so that power-assisted can not intervene in time, and start-up course can
The phenomenon that capable of generating vibration to vehicle, the prior art is difficult to quickly and smoothly start engine.
To solve the above problems, technical solution of the present invention provides a kind of starting control method of engine.
Fig. 1 is the flow diagram of the starting control method for the engine that technical solution of the present invention provides, as shown in Figure 1,
Step S1 is first carried out, when needing to start engine, initiates engine start instruction.
Power demand of the hybrid power control unit based on current hybrid power system, it is determined whether need to start and start
Machine.System signal when hybrid power control unit can be according to collected vehicle driving, calculates hybrid power system in real time
Power demand.The system signal includes the row of the accelerator pedal signal of hybrid power system, the travel speed of vehicle, vehicle
Gear etc. is sailed, the hybrid power control unit can determine current power demand according to the system signal, and then provide
Whether the instruction of the intervention of engine is needed.In order to more accurately obtain the power demand of the hybrid power system,
When determining the power demand of hybrid power system, anti-lock braking system (ABS, Anti-locked Braking can also be combined
System) signal, engine water temperature signal and noise, vibration and sound vibration roughness (NVH, Noise Vibration
Harshness) signal etc. carries out various considerations, and then accurately to obtain the power demand of hybrid power.
When hybrid power control unit, which is determined by calculation, to be needed to start engine, engine start instruction is initiated, it
Step S2 is executed afterwards.
Step S2 makes the first clutch between the engine and gearbox enter the sliding wear stage, to control
State the revolving speed of engine.
In the technical solution of the present invention, by the way that clutch is arranged between the engine and the gearbox, as shown in Fig. 2, passing through
The sliding wear of clutch drives engine rotation, and then realizes smooth starting engine.In present specification, it will be located at and start
Clutch between machine and gearbox is known as first clutch.The first clutch includes single plate clutch or multi-disc clutch
Device.
After hybrid power control unit initiates engine start instruction, pass through power existing in hybrid power system
Source, such as power source provided by driving motor (as shown in Figure 2) drive first clutch to carry out sliding wear, make by gearbox
The first clutch enters the sliding wear stage.Clutch or other way can be passed through between the driving motor and gearbox
Etc. being attached.
By the sliding wear of first clutch, drives the engine to be rotated (engine is also inactive at this time), start
Friction torque of the energy of machine rotation on first clutch, can be by controlling the pressure being applied on first clutch
Size, control the size of the friction torque on first clutch, and then realize the control to the revolving speed of engine.
For example, when the pressure being applied on first clutch changes, then the friction on first clutch is turned round
Square can also change, and the sliding wear revolving speed between first clutch and engine can change, and then the revolving speed of engine
It can change, the control to the revolving speed of engine may be implemented with this.
Execute step S3, when the revolving speed of the engine reaches the rotating speed of target of engine, the first clutch described in locking
Device initiates engine oil spout firing command, and carries out stabilization control to output shaft revolving speed using driving motor, described in completing
The starting of engine.
The rotating speed of target of the engine is associated with the output shaft revolving speed of the gearbox, in order to enable engine is starting
When can smoothly be linked into hybrid power system, so should be in the rotating speed of target phase one of the revolving speed and engine of engine
When cause, first clutch described in locking, so that engine is full access in the drive system of hybrid power system, at this time
Control engine oil spout igniting.After initiating engine oil spout firing command, due to there may be engine oil spout igniting when,
The revolving speed of engine will appear lesser fluctuation, in order to guarantee the stability of output shaft revolving speed, can pass through hybrid power at this time
Driving motor in system carries out stabilization control to output shaft revolving speed, and then completes engine start.
The starting control method of engine provided by technical solution of the present invention passes through the sliding wear band of the first clutch
Dynamic engine rotation, so when the revolving speed of engine reaches rotating speed of target, start engine, it can quick, smooth starting hair
Motivation promotes the ride comfort of engine start.
To make the above purposes, features and advantages of the invention more obvious and understandable, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.
Fig. 3 is the flow diagram of the starting control method of engine provided in an embodiment of the present invention, as shown in Fig. 2, first
Step S301 is first carried out, determines the power demand of hybrid power system.
System signal when hybrid power control unit can be according to collected vehicle driving, calculates hybrid power in real time
The power demand of system.
Step S302 is executed, judges whether to need engine start.
When the power demand of hybrid power system is bigger, relying only on power provided by driving motor can not expire
It when the power demand of pedal system, determines and needs the engine start, execute step S303；Otherwise it returns to step
S301 continues the power demand for obtaining hybrid power system.
Step S303 initiates engine start instruction.
When the power demand based on present hybrid system is controlled when determination needs to start engine by hybrid power
Unit initiates engine start instruction.
Hybrid power control unit can be controlled in hybrid power system based on the power demand of present hybrid system
Driving motor revolving speed.The rotating speed of target of engine is revolving speed of the output shaft after the conversion of gearbox speed ratio, can be by with this
Hybrid power control unit provides revolving speed when engine start, the i.e. rotating speed of target of engine.
Execute step S304, by power source provided by the driving motor in hybrid power system drive described first from
Clutch carries out sliding wear, and the first clutch is made to enter the sliding wear stage.
Can the power source as provided by the driving motor in hybrid power system, first clutch is driven by gearbox
Sliding wear is carried out, the first clutch is made to enter the sliding wear stage.Specifically, hybrid power control unit can be according to engine
Rotating speed of target controls first clutch cylinder pressure and pushes first in conjunction with water temperature information, the first clutch oil temperature information etc. of engine
Clutch disc intervenes the sliding wear stage, realizes the rotation that engine is driven by the sliding wear of first clutch.
Step S305 is executed, the pressure of the first clutch cylinder pressure is regulated and controled.
In the present embodiment, the first clutch can use oil clutch, can by regulation described first from
The oil pressure of clutch cylinder pressure realizes the control to the pressure of the first clutch cylinder pressure.
It, can be by regulating and controlling the big of the pressure being applied on first clutch in order to realize the control for engine speed
It is small, realize the control of the sliding wear revolving speed of the first clutch, and finally realize the control for engine speed.
For example, proportional-integral-differential (PID, Proportion Integration can be based on
Differentiation) algorithm regulates and controls the oil pressure of the first clutch cylinder pressure.With the pid algorithm to described
When the oil pressure of first clutch cylinder pressure is regulated and controled, can based on engine speed change rate and target revolution speed variation rate it
Between difference determine the input value of the pid algorithm, pid algorithm can be based on the input value, provide a regulation oil pressure, into
And the regulation to the oil pressure of the first clutch cylinder pressure is realized based on the regulation oil pressure.
The engine speed that the change rate of the engine speed can be obtained in real time based on hybrid power system obtains, institute
Stating target revolution speed variation rate can be according to the torque capability of current driving motor and the sliding wear torque energy of the first clutch
Power is determined.For example, the torque capability when the driving motor is larger, and the first clutch is acted in current pressure
Under, sliding wear torque capability is also in biggish situation, then the target revolution speed variation rate of the engine accordingly can be bigger, instead
It, if the torque capability of the driving motor is smaller, and the first clutch is under current pressure effect, sliding wear torque energy
Power is also in lesser situation, then the target revolution speed variation rate of the engine accordingly can be smaller.
It, can be with the absolute value of the difference between engine speed change rate and target revolution speed variation rate in step S305
Or the input value as pid algorithm such as square value of difference, with regulation oil pressure given by pid algorithm to first clutch
The oil pressure of device cylinder pressure is regulated and controled, and realizes the regulation to the pressure of the first clutch cylinder pressure.
Step S306 is executed, the sliding wear that the pressure based on the first clutch cylinder pressure controls the first clutch turns
Speed.
The friction when pressure of the first clutch cylinder pressure changes, on the corresponding first clutch
Torque can also change, and then the sliding wear revolving speed of the first clutch is caused to change, it is possible to be based on pid algorithm
The oil pressure of first clutch cylinder pressure described in given regulation oil pressure real-time monitoring, realizes the sliding wear for the first clutch
The control of revolving speed.
It should be noted that act on the pressure of first clutch cylinder pressure in addition to regulation oil pressure given by pid algorithm it
Outside, there are also the pressure that hybrid power system itself is supplied to first clutch.During vehicle driving, hybrid power system meeting
Certain pressure is provided to first clutch, this pressure always exists during vehicle is run, the size of pressure
It is to be changed according to the different of travel situations of vehicle.The pressure of the be supplied to first clutch of hybrid power system can also
To be not understood as the feedforward oil pressure of the first clutch.
Step S307 is executed, the revolving speed of the engine is controlled based on the sliding wear revolving speed of the first clutch.
Due to being in the sliding wear stage in the first clutch between engine and gearbox, when the first clutch
Sliding wear revolving speed changes, and the revolving speed for inevitably resulting in coupled engine also changes, and is based on first clutch
The control of the revolving speed for the engine may be implemented in the sliding wear revolving speed of device.
Step S308 is executed, judges whether the relative speed variation of engine is consistent with the target revolution speed variation rate of engine.
In order to realize the effect of better smooth engine starting, based on pid algorithm to the regulation of engine speed
In the process, whether the relative speed variation that engine can be monitored in real time is consistent with the target revolution speed variation rate of engine, if
The relative speed variation of engine is consistent with the target revolution speed variation rate of engine, pressure of the illustration on the first clutch
Power meets the needs of engine speed change rate enough, can be with without continuing to regulate and control the pressure of the first clutch cylinder pressure
Stop regulating and controlling the pressure of the first clutch cylinder pressure based on pid algorithm, i.e., be in the judging result of step S308 it is yes, then execute
Step S309；Otherwise S305 is returned to step, the pressure for regulating and controlling the first clutch cylinder pressure is continued.
Step S309, judges whether the revolving speed of engine reaches rotating speed of target.
When engine speed change rate is consistent with target revolution speed variation rate, the revolving speed of possible engine is had not been reached yet
The rotating speed of target of engine provides pressure since hybrid power system can have been based on current vehicle travel situations for first clutch
Power is based on the pressure, and the sliding wear revolving speed of first clutch still will continue to changed, and the revolving speed of engine is also to continue with change
Change, so can execute step S310 when the judging result of step S309 is no, continue to monitor the engine
Revolving speed, the situation of change of the revolving speed of real-time judge engine.
When step S309 judging result, which is, is, illustrates that the revolving speed of engine at this time has reached rotating speed of target, then may be used
To execute step S311.
Step S310 monitors the revolving speed of the engine.
When the rotating speed of target of engine has not been reached yet in the revolving speed of engine, continue the revolving speed for monitoring the engine,
During monitoring, it can return and continue to execute step S308 and subsequent step, until the revolving speed of engine reaches engine
Until rotating speed of target.
Step S311, first clutch described in locking initiate engine oil spout firing command, and using driving motor to defeated
Shaft revolving speed carries out stabilization control, to complete the starting of the engine.
If the revolving speed of engine has reached the rotating speed of target of engine, can be completed at this time with smooth starting engine
The sliding wear of first clutch, first clutch described in locking, engine oil spout igniting.Output shaft when in order to guarantee engine start
The stability of revolving speed, it is possible to stabilization control be carried out to output shaft revolving speed using driving motor, for example, working as output shaft revolving speed
When fluctuating, additionally apply torque forward or backwards by driving motor, so that output shaft revolving speed keeps stability.It completes
After the starting of the engine, driving motor and engine are worked together, and the power of driving motor and engine passes through gearbox
It is transmitted to driving wheel, completes the driving to vehicle.
It should be noted that in the present embodiment, entering the sliding wear stage in first clutch, and control the revolving speed of engine
During, the relative speed variation of the based on engine rotational speed difference of pid algorithm and engine completes the control for engine speed
System, so that the process of engine start is quickly and steady.
In other embodiments, it after first clutch enters the sliding wear stage, controls in the press process of first clutch,
The revolving speed that engine can also be directly based upon is controlled, without calculate engine relative speed variation whether the mesh with engine
It is consistent to mark relative speed variation, directly judges whether the revolving speed of engine reaches rotating speed of target, when the revolving speed of engine reaches target
When revolving speed, i.e. locking first clutch completes the starting of the engine, equally quickly, smoothly can complete engine and open
It is dynamic.
Although present disclosure is as above, present invention is not limited to this.Anyone skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (8)
1. a kind of starting control method of engine characterized by comprising
When needing to start engine, engine start instruction is initiated；
The first clutch between the engine and gearbox is set to enter the sliding wear stage, to control turning for the engine
Speed；
When the revolving speed of the engine reaches the rotating speed of target of engine, first clutch described in locking initiates engine spray
Oily firing command, and stabilization control is carried out to output shaft revolving speed using driving motor, to complete the starting of the engine, institute
The rotating speed of target for stating engine is associated with the output shaft revolving speed of the gearbox；It is described make to be located at the engine and gearbox it
Between first clutch enter the sliding wear stage, include: to control the revolving speed of the engine
It drives the first clutch to carry out sliding wear by power source provided by the driving motor in hybrid power system, makes institute
It states first clutch and enters the sliding wear stage；
Regulate and control the pressure of the first clutch cylinder pressure；
Pressure based on the first clutch cylinder pressure controls the sliding wear revolving speed of the first clutch；
The revolving speed of the engine is controlled based on the sliding wear revolving speed of the first clutch.
2. the starting control method of engine as described in claim 1, which is characterized in that the engine start instruction is by mixing
Power control unit is closed to initiate based on the power demand of hybrid power system.
3. the starting control method of engine as claimed in claim 2, which is characterized in that the power of the hybrid power system
Demand is what the accelerator pedal signal based on hybrid power system, Vehicle Speed and drivable position determined.
4. the starting control method of engine as described in claim 1, which is characterized in that the regulation first clutch
The pressure of cylinder pressure includes:
Regulated and controled based on pressure of the pid algorithm to the first clutch cylinder pressure.
5. the starting control method of engine as claimed in claim 4 characterized by comprising become based on engine speed
Difference between rate and target revolution speed variation rate determines the input value of the pid algorithm.
6. the starting control method of engine as claimed in claim 5, which is characterized in that further include: if engine speed becomes
Rate is consistent with target revolution speed variation rate, then stops the pressure for regulating and controlling the first clutch cylinder pressure.
7. the starting control method of engine as described in claim 1, which is characterized in that the first clutch includes monolithic
Clutch or multiplate clutch.
8. a kind of starting control device of engine characterized by comprising
Unit is initiated, suitable for initiating engine start instruction when needing to start engine；
Control unit, suitable for making the first clutch between the engine and gearbox enter the sliding wear stage, with control
The revolving speed of the engine；
Start unit, when rotating speed of target suitable for reaching engine when the revolving speed of the engine, first clutch described in locking,
Engine oil spout firing command is initiated, and stabilization control is carried out to output shaft revolving speed using driving motor, to complete the hair
The starting of motivation, the rotating speed of target of the engine are associated with the output shaft revolving speed of the gearbox；
Described control unit includes:
Sliding wear subelement, suitable for driving first clutch by power source provided by the driving motor in hybrid power system
Device carries out sliding wear, and the first clutch is made to enter the sliding wear stage；
Regulate and control subelement, suitable for regulating and controlling the pressure of the first clutch cylinder pressure；
First control subelement, the sliding wear for controlling the first clutch suitable for the pressure based on the first clutch cylinder pressure turn
Speed；
Second control subelement, the revolving speed of the engine is controlled suitable for the sliding wear revolving speed based on the first clutch.
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| CN201410709353.9A CN105691377B (en) | 2014-11-28 | 2014-11-28 | The starting control method and device of engine |
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| CN108327701B (en) * | 2018-02-22 | 2019-11-15 | 安徽江淮汽车集团股份有限公司 | A kind of starting control method and system |
| CN109606350B (en) * | 2018-12-24 | 2020-07-07 | 浙江吉利汽车研究院有限公司 | Engine starting control method, device and system |
| CN110103946B (en) * | 2019-04-18 | 2021-01-05 | 浙江吉利控股集团有限公司 | Hybrid electric vehicle engine starting control method and system |
| CN110194144B (en) * | 2019-05-05 | 2020-10-23 | 中国第一汽车股份有限公司 | Motor torque control method and device for starting engine of hybrid electric vehicle |
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| CN113830071B (en) * | 2021-09-30 | 2023-11-17 | 三一汽车起重机械有限公司 | Hybrid power system control method, hybrid power system and working machine |
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